Cardiac magnetic resonance with a retrospective ECG-gated breath-hold cine stack is the reference standard for assessing LV volumes, however this technique is unsuitable for patients who cannot hold their breath or suffer arrhythmia. A potential solution is a “retro-gated” real-time sequence which is prospectively triggered to acquire 120 frames over multiple heartbeats in each slice. Images from a beat most closely matching the median beat length for the entire stack are then temporally interpolated to 30 output phases for each slice. This retro-gated method showed good agreement with the reference standard sequence in a cohort of healthy volunteers.
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